Greaser of the Hot Rod Patrol grew up on the streets of Cybertron, participating in back-alley do-or-die races against violent thugs and future Decepticons. He has a record of petty larceny, and gets defensive if anyone brings up his history. By the way, in this context, "Greaser" refers to the American street gangs of the 1950s, with their greased-back hair. Y'know, like the Fonz. It's not the ethnic slur.